Soil Series Atlas

Clarksville soil series

Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults

050100150cm1 ft2 ft3 ft4 ftOiOrganic layer · slightly decomposed0–3 cm · 0–1 inATopsoil3–13 cm · 1–5 inELeached layer13–30 cm · 5–12 inBt1Subsoil · clay build-up30–46 cm · 12–18 inBt2Subsoil · clay build-up46–74 cm · 18–29 in2Bt3Subsoil · clay build-up, different parentmaterial74–104 cm · 29–41 in2Bt4Subsoil · clay build-up, different parentmaterial104–132 cm · 41–52 in3Bt5Subsoil · clay build-up, different parentmaterial132–152 cm · 52–60 in050100150cmOiOrganic layer ·slightly decomposed0–3 cm · 0–1 inATopsoil3–13 cm · 1–5 inELeached layer13–30 cm · 5–12 inBt1Subsoil · clay build-up30–46 cm · 12–18 inBt2Subsoil · clay build-up46–74 cm · 18–29 in2Bt3Subsoil · claybuild-up, differentparent material74–104 cm · 29–41 in2Bt4Subsoil · claybuild-up, differentparent material104–132 cm · 41–52 in3Bt5Subsoil · claybuild-up, differentparent material132–152 cm · 52–60 in
Typical pedon, to scale: 152 cm (60 in), 8 horizons.

Ultisols — strongly weathered, leached soils with a clay-enriched subsoil

With 2.80 million acres mapped, Clarksville is the 17th-largest of 24,791 U.S. soil series. In Missouri only one series covers more ground. It dates from 1901; only four atlas series are older. Besides it, only Kalkaska and Troup are somewhat excessively drained in this atlas.

Depth
Very deep
Drainage
Somewhat excessively drained
Water movement
Moderately high

Compare with another seriesSimilar series in the finder

Where Clarksville is mapped

2,802,758 acres in 83 soil survey areas, from current SSURGO data.

Alabama: 80,316 acresArizonaColoradoFloridaGeorgiaIndianaKansas: 7,669 acresMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahoma: 601,830 acresPennsylvaniaSouth DakotaTexasWyomingConnecticutMissouri: 1,426,357 acresWest VirginiaIllinois: 19,860 acresNew MexicoArkansas: 571,466 acresCaliforniaDelawareDistrict of ColumbiaIowaKentucky: 7,986 acresMarylandMichiganMississippiMontanaNew HampshireNew YorkOhioOregonTennessee: 87,273 acresUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Share of all Clarksville acres

  1. Missouri51%
  2. Oklahoma22%
  3. Arkansas20%
  4. Tennessee3%
  5. Alabama3%
  6. Illinois0.7%
  7. Kentucky0.3%
  8. Kansas0.3%
  • Rank in the state · share of its mapped soil
  • Missouri 2nd of 524 · 3.51%
  • Oklahoma 7th of 571 · 1.42%
  • Arkansas 12th of 359 · 1.81%

In the field

Drainage

Somewhat excessively drained

Drains fastStays wet

Troup and Kalkaska also are somewhat excessively drained.

Soil depth

Very deep

ShallowDeep

Water movement (Ksat)

Moderately high

SlowFast
Parent material
Residuum, limestone
Landform
Hills
Type location
Missouri

How it is classified

  1. OrderUltisols
  2. SuborderUdults
  3. Great groupPaleudults
  4. SubgroupTypic Paleudults
  5. FamilyLoamy-skeletal, siliceous, semiactive, mesic Typic Paleudultsloamy-skeletal particle-size classsiliceous mineralogy classsemiactive cation-exchange activity classmesic soil temperature regime

Against other Ultisols

Clarksville makes up 1.48% of all mapped Ultisols — the 5th largest of 1,278 series in the order.

Solum thickness (topsoil + subsoil)

152 cm over a median of 142 cm

Depth to the subsoil

30 cm over a median of 23 cm

Depth described

152 cm under a median of 178 cm

Its relatives

2 other established series share the family “Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults”

  1. Clarksville2.8 M
  2. Bouldin307 k
  3. Coulstone294 k

Close relatives, at one scale

  1. Clarksville152 cm · Typic Paleudults
  2. Bama188 cm · Typic Paleudults
  3. Ruston216 cm · Typic Paleudults

Horizon by horizon

HorizonLayerDepthThickness
OiOrganic layer: slightly decomposed0–3 cm0–1 in3 cm
ATopsoil3–13 cm1–5 in10 cm
ELeached layer13–30 cm5–12 in17 cm
Bt1Subsoil: clay build-up30–46 cm12–18 in16 cm
Bt2Subsoil: clay build-up46–74 cm18–29 in28 cm
2Bt3Subsoil: clay build-up, different parent material74–104 cm29–41 in30 cm
2Bt4Subsoil: clay build-up, different parent material104–132 cm41–52 in28 cm
3Bt5Subsoil: clay build-up, different parent material132–152 cm52–60 in20 cm

Sources: USDA–NRCS Official Series Description (revised 2004-06), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides